The rainbow pattern is a problem often encountered with PET protective film materials, because the surface of the PET protective film material is hardened, and the hardening is subjected to high temperature treatment, so a colored stripe will be formed on the surface of the material
The crystal point is also a common quality problem of PET protective film materials. The crystal point refers to the small pits on the surface of the protective film material, which is also called a bright spot. It is common in three-layer PET protective film materials. The main reason is that it is synthesized with silica gel. Silica gel has fluidity. If the surface of the protective film material is squeezed by some small particles, crystal points will be formed to avoid crystal points The best way is to protect the surface of the protective film!
Post time: Jul-21-2020